The morphology of the juvenile stages of moss mites of the family Scheloribatidae

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Krystyna Witek
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1 ACTA ZOOL. CRACOV K RA K ÓW, 30. X I Stanisław S e n i c z a k The morphology of the juvenile stages of moss mites of the family Scheloribatidae G r a n djean, 1953 (Acari, Oribatei) I [W ith 9 text-figures] Morfologia stadiów młodocianych mechowców z rodziny Scheloribatidae G r a n d je a n, 1953 (Acari, Oribatei) I A b s tr a c t: The author describes the morphology of all juvenile stages of Scheloribates latipes and, on the example of the tritonym ph, the most significant diagnostic characters of im m ature individuals of S. laevigatus. The two species m ainly differ in the shape of seate on n otogaster. INTRODUCTION To the family Scheloribatidae belong medium sized mites ( u m ) grouped in 6 genera ( S h a l d y b i n a 1975). They are fairly uniform as regards morphological structure, b u t differentiated in respect of ecological requirements. Most members of the family in question live essentially in soil. Generally these mites have low requirements as regards relative air humidity and food quality (they live on almost untransformed litter fall), they are fairly mobile and therefore populate the surface layers of soil. They may, especially in the adult stage, leave the soil for some time and live on trees, shrubs or herbaceous plants. A few species have adapted to aerial climate and live on plants, and only occasionally can be found in soil. In the soils of the northern and central Poland the most common of the family in question are three moss mite species: Scheloribates laevigatus (C. L. K o c h ), 8. latipes (C. L. K o c h ) and H emileius initialis ( B e r l e s e ). The first species occurs mainly in meadow soils ( F r e n z e l 1936, S t r e n z k e 1952, R a j s k i 1961, Ż y r o m s k a - R u d z k a 1976). R a j s k i (1961) found th at in meadow soil at Sypniewo near Poznań (plant community Arrhenatheretum elatioris) Scheloribates laevigatus reached a fairly high abundance 2.4 thou, in d./l m1) and dominance index (D = 8.4), in spite of the fact th a t the author identified only adult individuals of th a t species. Close investigations carried out in forest soils and taking into account all development stages of species of the family Scheloribatidae have demonem

13 499 P e re z - In ig o C Äcaros oribâtidos de suelos de Espana Peninsular e Islas Baleares (Acari, Oribatei) V. Eos, Madrid, 48 : , 36 ff. P e re z - In ig o C Äcari oribâtidos de la Isla Tenerife (Acari., Oribatei). Eos, M adrid, 51 : , 34 ff. P otjom kina У. A Moniezioz teljat. T rudy gelm. Łab., 5 : R a js k i А Mechowce (Acari, Oribatei) jako żywiciele pośredni tasiemców (Cestodes, Anoplocephalata) w świetle literatury. Zeszyty nauk. UAM, Poznań, biol. 2 : , 8 ff, 1 tbl. R a js k i A Studium ekologiczno-faunistyczne nad mechowcami (Acari, Oribatei) w kilku zespołach roślinnych. I. Ekologia. Prace Kom. Biol. P T P N, Poznań, 15 : 1 160, 21 tt. Selln ic k M Formenkreis: Hornmilben, Oribatei. Die Tierwelt M itteleuropas, Leipzig, 3 : 1 42, 91 ff. SHALDYBINA E. S Zarazajemost razlicnych vidov oribatid i rol ich v epizootołogii moniezioza na pastviscach gorkovskoj obłasti. Rab. gelm. (akad. K. I. Skr ia bin a ), Sha ld ybina E. S Semejstvo Scheloribatidae. In: G ilarov M. S., K rivolu c k ij D. A. Opredelitiel obitajuscich v pocvie kleścej. Izd. N auka, Moskva, , ff S tr e n z k e K U ntersuchungen über die Tiergemeinschaften des Bodens: Die Oribatiden und ihre Synusien in Böden N orddeutschlandt. Zoologica, S tuttgart, 104 : Subbo tin a I. A а. К biołogii Scheloribates laevigatus (C. L. K och, 1836) pancirnogo klesca iz sem ejstva Scheloribatidae. Uc. zap. GGPI, bioł., 66 : 33 50, 12 ff, 3 tt. W illm ann C Moosmilben oder Oribatiden (Oribatei). Die Tierwelt Deutschlands, Jena, 22 : , 364 ff. W oodring J. P., Cook E. F The biology of Ceratozetes B er lese, Scheloribates laevigatus K o ch and Oppia neerlandica O u d e ma n s (Oribatei) w ith a description of all stages. Acarologia, 1 : , 43 ff, 5 tt. Żyrom ska-r udzka H The effect of mineral fertilization of a meadow on the oribatid m ites and other soil mesofauna. Pol. ecol. Stud., 2 : , 6 ff, 16 tt. STRESZCZENIE Autor opisuje morfologię wszystkich stadiów młodocianych Scheloribates latipes oraz, na przykładzie tritonimfy, najważniejsze cechy diagnostyczne osobników młodocianych S. laevigatus. Wspomniane gatunki różnią się głównie kształtem włosów na notogaster. R edaktor pracy: prof, dr W. Szymczakowski

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